Power-hammer



No. 620,749. Patentad Mar. 7, 1899.. A. DINKEL.

POWER HAMMER.

(Application filed Aug. 20, 1898.) (No llpdal.) 3 Sheots-$haet I.

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' Patented Mar. 7, I899. A. DINKEL.

POWER HAMMER.

(Application filed Aug. 20, 189B.)

Patented Mar. 7, I899. A. DINKEL.

POWER HAMMER. (Application filed Aug. '20, 1898.)

3 Sheets-Sheet 3.

(Nu Model.)

INVENTOH ATTORNEYS WITNESSES NlTED STATES PATENT OFFICE.

ANDRPHV DINKEL, OF AUBURN, NEXV YORK.

POWER-HAM M ER.

SPECIFICATION forming part of Letters Patent No. 620,749, dated March 7, 1899.

Application filed August 20, 1898.

T0 (0% whom it may concern:

Be it known that I, ANDREW DINKEL, of Auburn, in the county of Cayuga and State of New York, have invented a new and Improved Power-Hammer, of which the following is a full, clear, and exact description.

This invention relates to improvements in power hammers or pressers; and the object is to provide a power-hammer so constructed that a very strong yet yielding blow may be given to the billet operated on, and, further, to so construct the machine that the rotary parts will pass over centers without straining the machine, to arrange the principal rotating parts close to the base, thus reducing the sway and vibration of the machine to a minimum, and to provide a machine that may be operated by less experienced operators than are generally required in other power-hammers.

Iwill describe a power-hammer embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar characters of referenceindicate corresponding parts in all the views.

Figure l is a side elevation of a power-hammer embodyingfmy invention with the yielding pressure device omitted. Fig. 2 is asection on the line 2 2 of Fig. 1. Fig. 3 is asecf tion on the line 3 3 of Fig. 2, and Fig. 4 is a sectional elevation of a hammer of modified construction.

The machine comprises a standard 1, mounted on a base 2 and having guides 3 at its front. Movable vertically in the guides is a hammer-head 4, which carries a die 5, coacting with a die 6, mounted on an anvil 7. The hammer-head 4 has a liquid-containing chamber 8, in which is movable a piston 9. The piston-stem 10 passes up through a studing-box 11, and at its upper end has a link connection 12 with a rocker-arm 13, supported on one end of arock-shaft 14. To the opposite end of the rock-shaft 14 is attached a rocker-arm 15, from which a pitman 16 extends to a crank-pin 17 on a crank 18, attached to a shaft upon which a driving-pulley 19 is also secured. As here shown, the pulley 19 is designed to be engaged by a loose belt-,which performs the function of a clutch Serial No. 689,106. (No model.)

that is, by tightening the belt by means of a foot-treadle 20, having a link 21 engaging with an angle-lever 21 on which is mounted a pulley 27, engaging the belt, the machine will be placed in operation. It is to be understood, however, that other starting and stopping mechanism may be employed without departing from the spirit of my invention, and therefore the device described is shown only in dotted lines in Fig; 2.

Arranged in the hammer-head 4 at one side of the chamber 8 is an auxiliary liquid-containing chamber 22, from the upper end of which a pipe 23 extends through a stuffingbox 24 and is designed to move into and out of a cylinder 25, which is partially filled with liquid-such, for instance, as oiland the space above the oil is designed to contain a yielding cushion-such, for instance, as an air-cushion; but obviously a spring-actuated piston may be employed in the cylinder in lieu of the air-cushion, and therefore my invention is not limited in this respect. The pressure of the cushion may be regulated to the work in handthat is, in heavy work the pressure should be greater than is required for light work; but this of course may be governed by the person having the machine in charge.

At the lower portion the chamber 8 has a port communication 26 with the auxiliary chamber 22, and these chambers at the upper portion have a port communication 27, and in either one or both of these ports a controlling-valve and throttle 28 may be placed, so as to control the amount of liquid passing from one chamber to another in a given time. As the area of the under side of the piston 9 is greater than the area of the upper side, which is due to the space occupied by the stem 10, there will be a tendency to force the piston upward by means of the oil underneath it and against the pressure of the oil at the top, which flows through the port 27.

In operation when the hammer-head is in its uppermost position the billet or other work to be operated upon is placed upon the lower die-section. Then by tightening the belt on the pulley 19 the machine will be placed in operation to force the hammer downward, causing the die to strike a strong yet yielding blow upon the work. At this time the hamtoo mer will remain stationary; but the piston will still move downward a certain distance against the resistance of the air-cushion in the cylinder 25, thus causing a pressing action on the work.

Instead of the pressure or cushion cylinder shown in the example of my improvement above described I may employ the arrangement shown in, Fig. 4-t-hat is, the hammerhead 4 is provided with the chamber 8' and the auxiliary chamber 22, as before described, and it is also provided with a pressure-chamber 29, having a port communication with the chamber 8. Movable in the chamber 29 is a piston 31, between which and the top of the chamber is an air-space, and in the top of this chamber is arranged a check-valve 32, which will allow the entrance of air should the air-pressure within the chamber fall below the outside or atmospheric pressure. In this example the upper end of the chamber 22 will be closed by a screw-plug 33 or other suitable means.

It will be seen that the rotary parts 18 and 19 are arranged at the base of the machine, whereby the vibration or swaying that would result were the said parts placed higher is obviated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a power-hammer, a sliding hammerhead having a piston'chamber for containing a liquid, a piston movable in the chamber and having its stem projecting through the upper end of the said chamber, means connected with the piston-stem for operating the piston, an auxiliary chamber communicating with lhe piston-chamber at the upper and lower sides of the piston, and a chambercontaining a liquid and a yielding cushion above the liquid thereof and offering a resistance to the liquid and consequently offering a resistance to the piston, substantially as specified.

chamber at the top and bottom, a piston movable in the first-named chamber, means for operating said piston, a cylinder adapted to be partially filled with liquid and having a yielding cushion above the liquid, and a pipe connection between the auxiliary chamber and said cylinder, substantially as -specified.

3. In a power-hammer, a standard, a hammer-head movable in guides on said standard, the said hammer-head having an oil-chamber and an auxiliary oil-chamber communicating at the top and bottom with the first-named chamber, a piston movable in the first-named chamber, a rock-shaft, means for operating said rock-shaft, a rocker-arm on said shaft, a link connection between the rocker-arm and the stem of the piston, a cylinder for containing liquid and air, and a pipe connection between said cylinder and the auxiliary chamber, substantially as specified.

4. In a power-hammer, a standard, a hammer-head movable Vertically in guides on said standard, an anvil at the base of the standard, the said hammer-head having a main chamber for containing oil and an auxiliary chamber for containing oil, the said chambers com-' municating near the top and bottom, a pistonoperating in the main chamber and having its stem projecting through the top of the same, a rock-shaft, a rocker-arm on said shaft, a link connection between the arm and the stem of the piston, a driving mechanism at the lower portion of the standard and having connection with the rockshaft, a cylinder for containing oil and an air-cushion, and a pipe extending from the upperend of the auxiliary chamber and movable in the said cylinder, substantially as specified.

5. In a power-hammer, a sliding and chambered hammer-head, a piston movable in the chamber of the hammer-head and having its stem projecting through the top of the same, means for operating the piston, a liquid-column, and a yielding cushion controlling the piston, substantially as specified.

ANDREIV DINKEL.

\Vitnesses:

FISHER. D. ROOKEFELLER, EUGENE L. DUNHAM. 

